Air-brake attachment.



T q CRAWFORD v j AIR BRAKE ATTACHMENT. k Arn ougox nun JULY 11, 19 8. 1 4 908,648; Patented Jam-5,1909;

UNITED STATES PATENT OFF-ice. -THOMAS J. eat-wrong or riittAroosA, QEQBGI.

e eraxatente am. 6. s

ucaaons a July 17, 1993. erial no. aegis.

tains to make andu se' the same. i

This invention relates to improvements in air brake attachments, and particularly to. 1

attachments that act to cause instant application of the brakes upon the derail ment of the trucks ofacar, and has for an object the provision of means that normally will leave the air brake system of a train in condition for holding the brakes oil the wheel, but when any of the trucks leave the track or any of the wheels of any of the trucks leave the track, will open the air pipes and permit the instant application of the brakes to the wheels.

Another object of the invention is the provision of an attachment for air brakes that will permit the usual up and down motion of the trucks as the same pass over the track,; but will instantly open the brake systemi when either air of wheels of any truck? leave the tradk.

With these and other objects in view the} invention comprises certain novel construe tions, combinations and arrangement of? parts as will be hereinafter more fully de-: scribed and claimed.

In the accompanying drawings: Figure 1 is a fragmentary section of a car taken longitudinally thereof showin the present invention connected therewit Fig. 2 is an enlarged detail view of avalve interposed in the brake system of the car and arranged with an operating lever. Fig. 3 is a detail view of the plug of the valve shown in Fig. 2.

In an ordinary air brake system the brakes are held off the wheel of the train as long as the system contains a sufficiently high pressure of air and the brakes are only a plied when the pipes are opened and the air permitted to escape. Various valves have een provided and arranged to be easily operated whenever desired, and also means have been provided that are connected with the valves for opening the same when the nds f n .0 t as g out of. were? alineme'nt 'inreatiop to the c r. a? pass i eal 'q t e aa a a 1s designe to not only open the brake's'ystepi of the train when the truck moves out of proper alinemept to the ear tp' which it is a ach bu a so t a sly e b aa wh n an the Wh af fl 'ea e r h tracker drop a specified distanqe belgw wea pen e: leave aw a t e w eer e-e t me: mgs ope complete operative Q evict? ahih indicates a 'valve' having an operate bas aye The val e 1 s i' rpsi 1n "lpes of the brake ,s stein lo "a car g, Pivot ally connected wlth" ever 2 is abar 5 i that is formed with an eye 6 atthe lower end thereof which is ada ted to encircle the aide 7 of one pair of whee s. The eye 6 is preferably made of sufiicient size as to loosely fit around axle 7 and be spaced some little dis.- tance therefrom so as to permit the ordinary up and down movement or jarring of the axle as the wheels pass over the track. The eye 6 is preferably formed with a ivotally mounted member 8 that is preferab y pivotally mounted at 9 and secured in position by .a bolt 10. By this construction and arrangement bolt 10 may be removed and the eye 6 forced around axle 7 and then bar 5 again placed in position and secured in the position shown in Fig. l by means of bolt 1Q.

In order to prevent any swinging action of the eye 6 and bar 5 a guiding bracket 11 is secured to car 4 and has an eye 12 surrounding bar 5. Bracket 11 is held firmly against movement and consequently will prevent any swinging motion of bar 5 but will permit a free reciprocatory movement thereof.

Valve 1 is arranged so as to-permit a free. passage of air through pipe 3, the air passing through an opening 13 in-the plug 14 of the valve. When the plug 14 is turned so as to permit opening 13 to register with aper- P air will be permitted to pass from one end 105 of pipe 3 to the other freely when the valve is in one position, and to freely pass from both ends of pipe 3 out through opening. 15. i

In case of derailment the truck will drop I a certain distance before the body of the car 1 is afi'ected. When the axle 7 thusi drops reason of the derailment of the truck-the eye 6 is pulled downwardly together with bar. 5.

- applied simply upon one axle of each truck or upon only one truck, but as it is desirable to set the brake Whichever truck may leave the track, it is, of course, obvious that in practice the device would be applied to each truck.

What I claim is:

1. In an air brake system for cars, a valve for opening the system, and a bar formed with means for encircling the axle of one of the pair of wheels of one of the trucks for actuating said valve, said rod being adapted to actuate said valve when 'said axle has moved away from .said valve a predetermined distance. i

2. In an air brake system for cars, a valve for opening said system,a pivotally mounted bar connected with said valve and adapted to actuate the same, said bar being formed,

venting a swinging movement but permitting a reciprocatory movement thereof.

3. In an air brake system for cars, a valve interposed in said system, a reciprocating bar connected with said valve for actuating the same, means encircling one of the axles of one of the tracks of said-car connected with said reciprocatin bar, and a bracket secured to said car an formed with an eye through which said reciprocating bar is adapted to move, said bracket permitting a free reciprocation of said bar but preventing any swinging motion thereof.

In testimony whereof I aflix my signature in presence of two witnesses.

THOMAS J. CRAWFORD.

Witnesses:

A. V. Howe, O. E. SUNNELSTEN. 

